JP2002330542A - Supporting system for operation and maintenance program of generator equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supporting system for an operation and maintenance program of generator equipment that makes operation programs of a plurality of generator units based on a total determination including a variety of conditions of apparatus or components of the generator units, using actual plant data. SOLUTION: A plurality of generator units 41, 42 and 51, 52 and a central feed command office 3 are connected to a service center 1 via a communication network 6. The service center 1 obtains the plant data from the plurality of generator units 41, 42 and 51, 52 via the communication network 6, calculates generation efficiencies of the generator units at every generator unit 41, 42 and 51, 52 at real time by using the obtained plant data and the design data of the generator units, and makes the operation and maintenance programs of the generator units 41, 42 and 51, 52 based on the calculated generation efficiencies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to the operation and operation of a power generation facility.
In connection with the maintenance planning support system, in particular, a service center that manages the operation and maintenance of multiple power generation units is provided, and this service center uses the plant data obtained from each power generation unit through a communication network to operate and operate each power generation unit. The present invention relates to a power generation facility operation / maintenance plan support system for preparing a maintenance plan.

[0002]

2. Description of the Related Art In general, many power generation companies operating a power generation business have a plurality of power generation units. In order to manage the power generation of these power generation units in an integrated manner, each power generation company has a centralized power generation unit. The power generation system is equipped with a dispatch center (medium-paid). In such a power generation system, the central power supply dispatching station allocates and adjusts the amount of power generation for each power generation unit according to the power demand on the consumer side, and maintains the power generation amount allocated by the central power supply dispatching station in each power generation unit. The operation adjusted as described above is performed. In this case, from the viewpoint of improving economic efficiency, the central dispatching center formulates an operation plan of this power generation system so that the fuel cost used in the power generation unit is minimized, that is, the power generation efficiency is maximized. From the perspective of giving priority to environmental conservation,
An operation plan of this power generation system is drafted so that the amount of exhaust gas such as nitrogen oxides and carbon dioxide emitted from the power generation unit falls within an allowable range.

[0003] Characteristics relating to power generation efficiency and exhaust gas amount, which are the basis of an operation plan, vary greatly depending on the type of fuel used and the power generation method. For fuel,
In the case of thermal power generation, many types of fuel such as coal, oil and natural gas are used. Depending on the type of fuel used, not only the amount of power generated per unit fuel price but also the amount of exhaust gas and its emissions The composition of the gas is also very different. As for the power generation method, the configuration of the device itself greatly affects the power generation efficiency, such as power generation by a steam turbine, power generation by a gas turbine, or combined power generation. The central dispatching center stores and stores plant data (data representing the characteristics of the plant) obtained from these power generation units for each power generation unit. Plant data is used.

[0004]

In the above-mentioned known power generation system, the central power supply command center stores and saves plant data for each power generation unit. At the start of operation, etc., the plant data is limited to plant data at a relatively early stage in the power generation unit, and such plant data changes gradually with the passage of time, or changes depending on the composition of the fuel used. Therefore, using only such plant data cannot make an operation plan based on actual plant characteristics in each power generation unit.

Further, in the above-mentioned known power generation system, equipment such as a gas turbine constituting a power generation unit is constantly exposed to high temperatures. Deterioration proceeds rapidly. For this reason, even if economical operation that simply minimizes the fuel cost is adopted for each power generation unit, if the load fluctuation of the equipment is repeated, the life of the equipment is shortened and the replacement time As a result, the total cost of each power generation unit required for plant operation, including maintenance costs, has not always been minimized.

Further, in the above-mentioned known power generation system, even if a power generation unit having high power generation efficiency is positively selected and operated for a plurality of power generation units, equipment or parts constituting the power generation unit are not used. If the probability of failure is high, an unplanned outage can occur due to equipment or component failure, which can result in economic loss.Therefore, an operation plan for multiple power generation units should be developed based solely on fuel costs. However, as a result, costs were not minimized.

The present invention has been made in view of such a technical background, and an object of the present invention is to use actual plant data and make a total judgment including various situations of equipment or parts of a power generation unit. It is an object of the present invention to provide a power generation facility operation / maintenance plan support system that formulates an operation plan for a plurality of power generation units.

[0008]

In order to achieve the above object, according to the present invention, a plurality of power generation units, a central power supply command center, and a service center are connected and arranged via a communication network. Plant data is obtained from each of the power generation units through the communication network, and for each of the plurality of power generation units, the power generation efficiency of the power generation unit is calculated in real time using the obtained plant data and the design data of the power generation unit, and the calculated power generation efficiency is calculated. The first means for drafting an operation / maintenance plan for each power generation unit based on the

According to the first means, an operation and maintenance plan of each power generation unit is formulated in the service center based on the power generation efficiency evaluated and calculated in real time. It is possible to consider a decrease in performance due to the occurrence of a failure or the like, and it is possible to reduce the operation cost as compared with the case where an operation / maintenance plan for each power generation unit is created using plant data in a known power generation system.

In order to achieve the above object, the present invention provides a power supply unit, a central power supply command center, and a service center which are connected to each other via a communication network. Obtain plant data through a communication network, estimate the process value for each of a plurality of power generation units by an equipment model using the obtained plant data, find the deviation between the estimated process value and the actual measurement value, and find the deviation value From the power generation efficiency of the power generation unit, and comparing the calculated economic loss cost with the cost of replacing equipment or parts in the power generation unit, A second means for preparing a maintenance plan is provided.

According to the second means, when a service center makes an operation / maintenance plan for each power generation unit based on the power generation efficiency evaluated and calculated in real time, the process value and the actually measured value estimated by the equipment model are used. Calculate the economic loss cost due to performance degradation from the deviation from
This economic loss cost can be compared with the cost related to the replacement of equipment or parts, and the operation and maintenance plan for each power generation unit can be formulated using the comparison result, thereby reducing the total operation and maintenance cost. be able to.

[0012] Further, in order to achieve the above object, according to the present invention, a plurality of power generation units, a central power supply command center and a service center are connected and arranged via a communication network,
The service center obtains plant data from each of the plurality of power generation units through the communication network, calculates the remaining life of the equipment or components of the power generation unit using the obtained plant data for each of the plurality of power generation units, and calculates the remaining time. A third means is provided for formulating an operation / maintenance plan for each of the power generation units by formulating a replacement time of the equipment or parts of the power generation unit based on the life.

According to the third means, when the service center formulates an operation / maintenance plan for each power generation unit based on the power generation efficiency evaluated and calculated in real time, the operation / maintenance based on the calculated remaining life is calculated. Since planning is being performed, it is possible to determine the time to replace equipment or parts with higher accuracy than in the case where equipment or parts are replaced based on the cumulative operation time in a known power generation system, As a result, it is possible to prevent the occurrence of abnormalities caused by the use of equipment or parts whose life has been exceeded and the occurrence of economic loss due to unplanned shutdown of the plant due to the equipment or parts being abnormal. In spite of the above, there is no need to replace equipment or parts at regular intervals, so that maintenance costs can be reduced.

According to another aspect of the present invention, a plurality of power generation units, a central power supply command center, and a service center are connected and arranged via a communication network. Obtain plant data through the communication network, for each of a plurality of power generation units, calculate the remaining life of the equipment or parts of the power generation unit using the obtained plant data,
By comparing the calculated remaining life with the remaining life of the equipment or parts of the power generation unit obtained from another power generation unit, the operating conditions of the equipment or parts of the power generation unit are changed so as to increase economic efficiency, and A fourth means is provided for drafting an operation / maintenance plan for each power generation unit by extending or shortening the replacement of equipment or parts of the unit.

According to the fourth means, when the service center formulates an operation / maintenance plan for each power generation unit based on the power generation efficiency evaluated and calculated in real time, not only its own power generation unit but also other power generation units. Since the operating conditions of own power generation unit equipment or parts are changed based on the remaining life of the power generation unit equipment or parts, the total cost required for operation and maintenance of each power generation unit is minimized. It is possible to formulate an operation and maintenance plan, and the cost advantage obtained by a power generation company is greater than that of a known power generation system.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of a system for supporting operation and maintenance of a power generation facility according to the present invention.
FIG. 3 is a block diagram showing a configuration of a main part thereof.

As shown in FIG. 1, the operation and maintenance plan support system for a power generation facility includes a service center 1 for preparing an operation and maintenance plan and a power generation company 2 having two power plants 4 and 5. A central power supply command center (intermediate power supply) 3 for instructing the two power plants 4 and 5 to output a power generation amount corresponding to the power demand, and an A power plant 4 having two power generation units 41 and 42. A power plant 5 having two power generation units 51 and 52, and a communication network 6 such as the Internet. In this case, the service center 1, the central power supply command station 3, the power generation units 41 and 42, and the power generation units 51 and 52 are selectively connected to the communication network 6.

The power generation company 2 has an A power plant 4
Of the power generation units 41 and 42 and the power generation units 51 and 52 of the B power plant 5 are requested to the service center 1 for planning work.

FIG. 2 is a block diagram showing an example of the configuration of the power generation unit 41 shown in FIG.
FIG. 2 is a block diagram showing an example of the configuration of the service center 1 shown in FIG.

As shown in FIG. 2, the power generation unit 41
A first sensor 412 for detecting a first process value, a second sensor 413 for detecting a second process value, and a first control device for controlling a first portion of the main body 411 on the main body 411 side of the power generation unit 41. 414, a second controller 415 for controlling the second part of the main body 411, and a process calculator 416 for converting the first and second process values into transmission signals. In addition, a process value transmission unit 417 and a firewall 418 are provided. In the known power generation unit, the process computer has a function of calculating the process value detected by the first and second sensors, and all the process values necessary for operating the power generation unit are stored in the database. The process value transmitting unit 417 acquires the process value from the database of the process computer 416 and transmits the process value to the communication network 6 through the firewall 418. When the process value is transmitted, the transmission time information and the ID for specifying the power generation unit 41 are transmitted together. In this embodiment, since the Internet is used as the communication network 6, a firewall 418 is installed to prevent unauthorized access to the power generation unit 41 from outside. If is used, the firewall 418 can be omitted.

As shown in FIG. 3, the service center 1 includes a firewall 11, a process value receiving unit 12, a process value database 13, an equipment model database 14, a material information database 15,
Failure information database 16, manufacturer information database 17, design information database 18, efficiency diagnosis unit 19
, A remaining life diagnosis unit 20, a failure frequency evaluation unit 21, a manufacturer priority evaluation unit 22, a power demand reception unit 23, an operation plan information transmission unit 24, an operation plan evaluation unit 25, and a periodic inspection ( A regular inspection) information database 26 and a device information database 27, and these constituent elements 11 to 27
Are interconnected as shown in FIG.

The power generation unit 41 includes a process value transmitting unit 4
When 17 transmits the process data, the process data is transmitted to the service center 1 through the communication network 6. The service center 1 acquires the process data through the firewall 11, transmits the acquired process data from the process value receiving unit 12 to the process value database 13, and stores the process data therein. Similarly, the process data transmitted from the other power generation units 42, 51, and 52 is also stored in the process value database 13 in the same manner.
To be stored.

FIG. 4 is an explanatory diagram showing the contents stored in the process value database 13 shown in FIG.
It shows the structure of process data.

As shown in FIG. 4, the process data includes, for each power generation unit, I data for identifying a process value.
A process number D is assigned, and managed by the process number. In this case, the service center 1 obtains the process data from the power generation units 41, 42, 51, 52 at regular intervals. In the first embodiment, the service center 1 stores the process data stored in the process value database 13. As can be seen from the time content of the data, the process data is obtained at one-second intervals.

The central power supply command center 3 transmits the amount of power required to be supplied by the power generation company 2 to the service center 1 through the communication network 6 as power demand information. Since this power demand information changes every moment according to the power demand, it is transmitted at a constant period, for example, every second. In the service center 1, the power demand information is received by the power demand receiving unit 23 through the firewall 11, and the received power demand information is supplied to the operation plan evaluation unit 25. At this time, the operation plan evaluation unit 25 sets the power generation units 41, 42, 51, 52 such that the sum of the power generation amounts of the power generation units 41, 42, 51, 52 matches the required value.
The power generation amount is distributed to 51 and 52, and the result of the distribution is supplied to the operation plan information transmitting unit 24. The operation plan information transmitting unit 24 transmits the operation plan information, that is, each of the power generation units 4.
The power generation amount information distributed to 1, 42, 51, and 52 is transmitted to the central power supply command center 3 through the communication network 6. The central power supply command center 3 checks the contents of the operation plan information sent from the service center 1 and outputs a command value of the power generation amount to each of the power generation units 41, 42, 51, 52 according to the operation plan information. .

The description so far relates to an operation plan corresponding to an ever-changing power demand in the operation / maintenance plan support system for a power generation facility. The support system also formulates long-term operation plans. For example,
Based on the plant data acquired online, the state of the equipment or parts of the power generation unit is determined, and based on the results of the determination, the power generation unit is disassembled and inspected, parts are replaced, or the time for the periodic inspection of the power generation unit is performed. We make a maintenance plan such as adjustment.

The above is an outline of the services provided by the service center 1 to the power generation company 2.

Thereafter, in the service center 1,
The processing steps for executing the operation and maintenance plan will be described in detail.

The service center 1 uses the power generation efficiency of the power generation unit as one of the indexes for drafting an operation plan. Hereinafter, a process for calculating the power generation efficiency will be described.

In the service center 1 shown in FIG. 3, the point at which the power generation efficiency is evaluated is the efficiency diagnosis unit 19. The efficiency diagnosing unit 19 refers to the design information database 18 and investigates the type of the device constituting the power generation unit.

FIG. 5 is an explanatory diagram showing the contents stored in the design information database 18 shown in FIG. 3, and shows the structure of the design information data.

As shown in FIG. 5, the design information data includes equipment or parts constituting the power generation unit, and a supplier and a model for each of the equipment or parts. For example, in the case of the first power generation unit of the power plant A, the gas turbine adopts a product of a model GT001 of the company A, and the components constituting the gas turbine include a combustor of a model CB003 of the company B and a turbine Company A model TB001,
It shows that the compressor is made of CP001 of Company A.

The efficiency diagnosing unit 19 refers to the equipment model for calculating the power generation efficiency from the equipment model database 14.

FIG. 6 is an explanatory diagram showing the contents stored in the device model database 14, showing the structure of the device model data.

As shown in FIG. 6, the equipment model data is composed of parts or models and equipment models for each part or model, and the entity of the equipment model is a program that operates on a computer. . Further, the equipment model data, for each device model, also the process number of the process value as a program input and output are given.

The efficiency diagnosis unit 19 operates a program according to the input / output specifications stored in the device model database 14.

Next, processing steps for performing efficiency diagnosis using the device model will be described.

FIG. 7 is an explanatory diagram showing a schematic configuration of the gas turbine. As shown in FIG. 7, the gas turbine includes:
It comprises a compressor, a combustor, and a turbine, between which air, combustion gas or fuel flows. For example, the device model shown in FIG.
, The performance of each gas turbine can be calculated by calculating the performance of each gas turbine model. That is, as shown in FIG. 7, when the measured values such as the fuel, the shaft rotation speed, the flow rate and the temperature of the intake air, etc. are set in the input of the device model, the electric output and the exhaust gas temperature which should be output under the input conditions are determined. Can be estimated. The calculation is performed on the assumption that each device model operates normally. Therefore, when a deviation occurs between the estimated value obtained from the device model and the actually measured value obtained from the plant data, it can be determined that the power generation unit that has generated the plant data has deviated from the normal state.

FIG. 8 is a characteristic diagram showing a change over time between an estimated value of the electric output by the device model and an actually measured value obtained from the power generation unit. The vertical axis indicates the electric output, and the horizontal axis indicates the time.

As shown in FIG. 8, at the initial stage, the estimated value and the measured value are almost the same, but as time elapses, the deviation between the estimated value and the measured value increases. This means that the performance of the gas turbine of the power generation unit deteriorates due to the progress of deterioration, and the output as designed cannot be obtained from the power generation unit. In this example,
Although the performance of the entire gas turbine is calculated, the performance of each compressor, combustor, and turbine alone can also be calculated. In this case, it is possible to identify the component whose performance is degraded, and this is an effective means for grasping the cause of the failure.

The efficiency diagnosis unit 19 converts the result of the performance calculation obtained by the device model into a power generation cost, and compares this with the power generation cost obtained from the actually measured value of the plant data.

FIG. 9 is a characteristic diagram showing an example of an analysis example of the efficiency diagnosis executed by the efficiency diagnosis unit 19, wherein the vertical axis represents the power generation cost and the horizontal axis represents the output. It is a comparison between the evaluation of the actually measured value acquired from the plant data and the evaluation.

In FIG. 9, the power generation cost is defined as a fuel cost necessary to output a unit power generation amount, and this fuel cost is obtained at regular time intervals (for example, every one hour). The evaluation The in measured values in FIG. 9, the electrical output and fuel flow rate are stored in the process value database 13, a power generation cost calculated by using the previously obtained fuel prices, the cost of producing electricity, fuel The flow rate is multiplied by the fuel price, and the result of the multiplication is divided by the electric output to calculate.
On the other hand, the evaluation using the estimated value based on the device model in FIG. 9 refers to the power generation cost obtained using the measured value as the fuel flow rate and the estimated value based on the device model as the electric output. If the power generation costs obtained by both methods are plotted for each load, the two graphs match if the performance of the device can be obtained as designed. In the example shown in FIG.
This shows a case where the power generation cost rises due to a decrease in the performance of the device.

Next, an operation plan evaluator 25 is used to formulate an operation / maintenance plan using the power generation cost calculated by the efficiency diagnosis unit 19. Therefore, processing executed by the operation plan evaluation unit 25 will be described.

The operation plan evaluation unit 25 uses the power generation costs of the power generation units 41, 42, 51, and 52 obtained online, and, from an economic viewpoint, the operation of each power generation unit 4
A plan is prepared to actively operate the power generation unit having a low power generation cost among 1, 42, 51, and 52. For example, in one power generation unit 41 among the power generation units 41, 42, 51, and 52, assuming that deterioration of its constituent devices, for example, a gas turbine, is progressing and efficiency is reduced, as described above. A deviation occurs between the power generation cost based on the actually measured value obtained from the process data of the power generation unit 41 and the power generation cost obtained from the estimated value based on the device model. At this time, the operation plan evaluation unit 25 evaluates the economic loss due to the performance degradation using the following equation (1).

Assuming that the economic loss (低下) due to the deterioration in performance is L1, L1 = C × A × D1 and this formula is referred to as formula (1). Here, C is an increase in power generation cost due to performance degradation ($ / MWd), A is an amount of power generation per day (actual value) (MWd / day), and D1 is the number of days remaining until regular inspection (Day). In the formula (1), the power generation amount A per day is obtained by using the average value of the cumulative value of the electric output on each operation day. By multiplying the power generation amount A per day by the number of remaining days D1 until the periodic inspection (regular inspection), the expected power generation amount that can be generated before the periodic inspection can be calculated. Information on the schedule of the periodic inspection is stored in the periodic inspection information database 26.

FIG. 10 is an explanatory diagram showing the contents stored in the regular inspection information database 26, and shows the structure of the periodic inspection information data.

As shown in FIG. 10, the periodic inspection information data is information indicating the time of the periodic inspection performed in the past and the time of the periodic inspection scheduled to be performed in the future, and is based on the periodic inspection information data. To calculate the number of days remaining until the periodic inspection. Expected power generation up to periodic inspection (A × D1)
Is multiplied by the increase in power generation cost (C), the economic loss (L1) due to the performance degradation can be calculated.

Next, from the viewpoint of the total cost of operation maintenance, the operation plan evaluation unit 25 determines whether to stop the operation of one power generation unit, for example, the power generation unit 41 and replace the equipment or parts, or It is determined whether the operation should be continued in a state where the pressure has decreased. At this time, the operation plan evaluation unit 25 refers to the equipment information database 27 and calculates the cost associated with replacement of the equipment or parts.

FIG. 11 is an explanatory diagram showing the contents stored in the device information database 27, and shows the structure of the device information data.

As shown in FIG. 11, the device information data includes the manufacturer and model, purchase price,
It consists of the number of days required for installation work. in this case,
The cost associated with the replacement of equipment or parts is the sum of the market value of equipment or parts including depreciation and the opportunity loss of power sales due to the suspension of the power generation unit due to replacement work, and is expressed by the following formula ( It is represented by 2).

Assuming that the economic loss (￥) due to equipment / part replacement is L2, L2 = P × (1−R) + A × D2 × E, and this equation is referred to as equation (2). Here, P is the replacement device / part purchase price ($), R is the life consumption value (standard value) (-), and A is the amount of power generation per day (actual value) (MWd / ), D2 is the number of installation work days (days), and E is the selling price of electric power ($ / MWd).
It is. In Expression (2), the storage information of the device information database 27 is referred to for the purchase price (P) of the device or component. The depreciation is evaluated in consideration of the remaining life, and the already consumed life (R) is used as an index. The life consumption value (R) is a standardized value, which is 0 when the product is in a new state at the start of use, and the value increases according to the number of years of use and reaches the replacement standard. 1
become. That is, when the life consumption value (R) becomes 1,
This means that the equipment has been used up and is no longer worth it. The method of calculating the life consumption value (R) will be described later.
In addition, regarding the opportunity loss of power sales, the amount of power generation per day (A) is multiplied by the number of installation work days (D2) which is information stored in the device information database 27, so that replacement of devices or parts is possible. The amount of power that could not be generated can be calculated. In addition, the selling price of electricity (E)
By multiplying by, the economic loss (L2) associated with replacement of equipment or parts can be calculated.

The operation plan evaluation unit 25 compares the economic loss (L1) caused by the performance degradation with the economic loss (L2) caused by replacement of the equipment or parts. As the performance of the power generation unit deteriorates, the economic loss (L1) is reduced to the economic loss (L1).
When exceeding 2), stop the operation of the power generation unit,
Plan to replace equipment or parts. Further, the decrease in the amount of power generation due to the stoppage of the operation of the power generation unit is planned to be increased by offsetting the amount of power generation of the other power generation units.

Further, in the service center 1,
The remaining life of equipment or parts is used as one of the indicators for developing an operation plan. Hereinafter, a process for calculating the remaining life will be described.

In the service center 1, the remaining life diagnosing unit 20 evaluates the remaining life of the device or component. The remaining life diagnosis unit 20 evaluates the remaining life of each power generation unit based on the remaining life evaluation data of each power generation unit stored in the material information database 15.

FIG. 12 is an explanatory diagram showing the contents stored in the material information database 15, and shows the structure of the material information data, that is, the remaining life evaluation data.

Components that are exposed to high temperatures during operation, such as gas turbines, undergo thermal fatigue damage due to a change in thermal stress accompanying a change in applied temperature, and creep damage that progresses in accordance with the applied temperature and its connection time. I do. When these damages exceed a certain limit value, they cause damages such as cracks and cause a major accident.

As shown in FIG. 12, the remaining life evaluation data is a graph showing the accumulation of thermal fatigue damage and creep damage in each power generation unit (gas turbine). In the graph of the thermal fatigue damage, the vertical axis is the normalized thermal fatigue damage value, the horizontal axis is the integrated value of the exhaust gas temperature change rate every 10 seconds, and when the thermal fatigue damage value reaches 1,
It is the limit of material resistance to thermal fatigue damage value. That is,
The integrated value of the exhaust gas temperature change rate in the gas turbine is the difference between the current temperature value of the exhaust gas temperature and the temperature value 10 seconds ago (10
Multiplied by the normalization constant to the absolute value of
This is a value obtained by adding the multiplication result every 10 seconds, and the thermal fatigue damage value monotonically increases with time. In the graph showing the creep damage, the vertical axis is the normalized creep damage value, the horizontal axis is the exhaust gas temperature integrated value every 10 seconds, and when the creep damage value reaches 1, when the creep damage value reaches 1, It is the limit of material resistance. The creep damage value increases monotonically with time. The consumed life (R) of the gas turbine is determined from the sum of the thermal fatigue damage and the creep damage value. That is, R = H
The life (R) can be obtained from + C (expression) 3. Here, H indicates a thermal fatigue damage value (normalized value), and C indicates a creep damage value (normalized value).

FIG. 13 is a graph plotting a change state of the life consumption value obtained by the above processing with respect to time, and shows an analysis example analyzed by the remaining life diagnosis unit 20.

A new gas turbine has a life consumption value of 0 at the time of installation, and gradually increases as the operation with a temperature change such as start / stop and load adjustment is repeated. In order to evaluate the remaining life of a gas turbine, the life consumption value up to the present is extrapolated to the life consumption value by a formula that expresses the life consumption value, and the prediction result, the life consumption value is calculated on the basis of replacement. It is determined from the remaining time until reaching a certain 1.

In the service center 1, the operation plan evaluation section 25 acquires the remaining life data evaluated by the remaining life diagnosis section 20, and makes an operation plan using the remaining life data.

FIG. 14 is a flowchart showing the flow of processing when the operation plan evaluation unit 25 makes an operation plan for a certain power generation unit using remaining life data.

The flowchart will be described with reference to FIG. 14. First, in step S1, the operation plan evaluation unit 25 acquires the remaining life data of the power generation unit evaluated by the remaining life diagnosis unit 20, and calculates the remaining life of the power generation unit. Calculate the number of days.

Next, in step S2, the operation plan evaluator 25 refers to the periodic inspection information database 26 to determine the number of days until the periodic inspection of the power generation unit, and calculates the number of days of remaining life until the determined periodic inspection. It is determined whether it is longer than the number of days. When it is determined that the number of days of the remaining life is longer than the number of days before the periodic inspection (Y), the process proceeds to the next step S3, while it is determined that the number of days of the remaining life is not longer than the number of days before the periodic inspection. If (N), the process proceeds to another step S4.

Next, in step S3, the operation plan evaluation section 25 makes an operation plan so as to perform normal operation on the power generation unit, and ends the processing of the series of flowcharts.

In step S4, the operation plan evaluation unit 25 sets the maximum power generation amount of the power generation unit to 2
Reducing the load by 5% to 75% of the current power generation amount, and reducing the load adjustment amount that changes in accordance with the power demand by 25% to 75% of the current load adjustment amount, respectively, and the remaining life of the power generation unit Develop an operation plan that extends

Subsequently, in step S5, the operation plan evaluation unit 25 determines that the maximum power generation amount in the power generation unit is 1
It is determined whether or not the amount has been reduced by 00%. When it is determined that the maximum power generation amount has been reduced by 100% (Y), the process proceeds to the next step S6. On the other hand, when it is determined that the maximum power generation amount has not yet been reduced by 100% (Y), another step is performed. Move to S7.

Subsequently, in step S6, the operation plan evaluation section 25 repeats the process in step S4 four times, as described later, and the remaining life has arrived. An operation plan for stopping is drawn up, and the processing of this series of flowcharts ends.

In step S7, the operation plan evaluation unit 25 makes an operation plan for continuing the operation of the power generation unit for one week. Then, the operation plan evaluation unit 25
One week after the completion of the operation plan, the process returns to step S1, and the operations after step S1 are repeatedly executed.

In parallel with the drafting of the operation plan, the operation plan evaluation unit 25 generates an operation plan for actively selecting and operating a power generation unit having a high power generation efficiency based on the power generation efficiency of each power generation unit calculated online. Make a plan. For example, as shown in FIG. 9, the power generation amount (output) of the power generation unit
Lowering the power generation efficiency lowers (increases cost) despite the lowering of performance due to abnormalities. Therefore, the power generation unit adjusted to reduce the amount of power generation based on the remaining life has a low probability of operation. Then, as a result of performing the remaining life diagnosis on each of the power generation units, the operation plan evaluation unit 25 drafts a maintenance plan for exchanging devices or components for the power generation units determined to be stopped.

The above description shows an example in which, when an operation / maintenance plan for a power generation unit is drawn up using remaining life data, deterioration of equipment or parts progresses more than expected, and the replacement time has been advanced. It is. In normal operation and maintenance plans for power generation units, equipment or parts are replaced at the time of periodic inspections based on remaining life data. Even in the case where the service life has arrived earlier than expected, it is also possible to formulate an operation plan that does not use equipment or parts whose service life has exceeded the service life. For this reason, in the operation and maintenance plan support system of the power generation equipment according to the present embodiment, an unexpected situation such as an unplanned shutdown of the power generation unit caused by an abnormality generated based on equipment or parts whose life has been exceeded is considered. Generation can be avoided, and economic loss associated with unplanned shutdown of the power generation unit can be avoided.

On the other hand, in contrast to the above-described example, there is also an example in which it is possible to extend the replacement time of a device or a part based on the diagnosis result of the remaining life evaluated in real time. For example, a gas turbine whose deterioration progresses quickly due to exposure to high temperatures,
Until now, the reference time for replacement (for example, when the cumulative operation time is 5
0000 hours), and equipment or parts are replaced during the periodic inspection so that the reference time is not exceeded. In this case, if the remaining life of the device or component still remains, it is not necessary to replace the device or component when the reference time has been reached, and the replacement time can be extended. In this case, the maintenance cost can be reduced as compared with the replacement of the device or the component based on the reference time.

The service center 1 uses the failure frequency of the equipment as one of the indexes for drafting the operation plan. Hereinafter, a process for calculating the failure frequency of the device will be described.

In the service center 1, the failure frequency evaluation unit 21 evaluates the failure frequency of the device. The failure frequency evaluation unit 21 evaluates the failure frequency of each device based on the failure information data stored in the failure information database 16.

FIG. 15 is an explanatory diagram showing the contents stored in the failure information database 16, showing the structure of the failure information data.

As shown in FIG. 15, the failure information data indicates the history of failures that have occurred in each power generation unit. For example, on September 10, 2000, the first power generation unit In the case of VL0010, the packing of the valve of model VL0010 manufactured by Company A was deteriorated and repaired.
It also shows that the replacement was performed on March 10. According to the contents of the failure information data, it can be understood that the valve has failed after being used for about 8 years and 6 months. The same applies to the pump of the second power generation unit of the power plant B.

Using the data stored in the failure information database 16, the failure frequency evaluation unit 21 evaluates the probability of failure of each device or component (once every year), and evaluates the failure. The evaluation result is supplied to the operation plan evaluation unit 25.

The operation plan evaluation unit 25 includes the failure frequency evaluation unit 2
Evaluation result supplied from 1 and regular inspection information database 2
By using the reference result of No. 6, it is evaluated whether or not the equipment or the components of each power generation unit can be used without failure until the time when the periodic inspection is performed. If there is a device or a component that has no more until the next periodic inspection is performed by estimating from the failure probability of the device or the component, the replacement of the device or the component is planned in the periodic inspection.

Further, in the service center 1,
As one of the indexes for formulating an operation plan, the priority for a manufacturer (manufacturer) is used. Hereinafter, a process for calculating a priority for a manufacturer will be described.

In the service center 1, the place where the priority for the maker is evaluated is the maker priority evaluation section 22. The maker priority evaluation unit 22 is configured to determine the maker priority based on each maker information stored in the maker information database 17.
Evaluate the manufacturer's priority.

FIG. 16 is an explanatory diagram showing the contents stored in the maker information database 17, showing the structure of the maker information data.

As shown in FIG. 16, the maker information data evaluates the reliability and maintenance ability of each maker for each device or component.
A, B, and C are used as evaluation criteria. In this case, A
Is 10 points, B is 5 points, C is 0 points,
By obtaining the total score, the priority of the manufacturer becomes higher in descending order of the score.

When selecting and operating a power generation unit, if the priority of the equipment or component maker used in the power generation unit is high, the operation plan evaluation unit 25 actively selects and operates the power generation unit. Make a plan like this.

As described above, in the operation and maintenance plan support system for power generation equipment according to the present embodiment,
When drafting an operation / maintenance plan for each power generation unit, the plan is made using the performance diagnosis result, the remaining life diagnosis result, the failure frequency, and the priority for the manufacturer.

FIG. 17 shows a second embodiment of the operation / maintenance plan support system for power generation equipment according to the present invention, and is a block diagram showing a main part of the system.

In the example shown in FIG. 17, the power generation unit 41 has two shafts 61 and 62, and the power generation unit 42 has two shafts 7 and 6.
The power generation unit 51 has two shafts 81 and 82.
The power generation unit 52 has two shafts 91 and 92, and each of the power generation units 41, 42, 51 and 52 has a shaft 6.
This shows an example in which the power generation amount is adjusted for each of 1, 62, 71, 72, 81, 82, 91, and 92. FIG.
In FIG. 7, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

In FIG. 17, shafts 61, 62, 71, 7
Reference numerals 2, 81, 82, 91, and 92 denote rotating shafts for transmitting the power of the turbine to the generator. In the power generation units 41, 42, 51, and 52, there are a plurality of generators. , One or more turbines are connected to each other. Such a power generation unit 41,
Shafts 61, 62, 71, 7 for 42, 51, 52
By setting the power generation amount for each of 2, 81, 82, 91, and 92, that is, for each generator, an extremely detailed operation and maintenance plan can be drafted. For example, a plurality of shafts 6 forming the power generation units 41, 42, 51, 52
Among 1, 62, 71, 72, 81, 82, 91 and 92, it is also possible to make a plan in which the operation of one axis is stopped and only the other axis is operated.

In this case, the operation of the operation / maintenance plan support system for the power generation equipment according to the second embodiment shown in FIG. 17 is the same as the operation of the power generation equipment according to the first embodiment shown in FIG. The operation of the power generation facility according to the second embodiment is almost the same as the operation of the maintenance plan support system.
Description of the operation of the maintenance plan support system is omitted.

FIG. 18 shows a third embodiment of the operation and maintenance plan support system for power generation equipment according to the present invention, and is a block diagram showing a main part of the system.

The example shown in FIG. 18 shows an example in which there is one central power feeding command station for each of the power plants 4 and 5.
And a central power supply command center 7 for the power plant 5. In FIG. 18, the same reference numerals are given to the same components as those shown in FIG.

In the third embodiment, the service center 1 operates in accordance with the amount of power generation requested by each of the central power supply command stations 3 and 7 supplied through the communication network 6. The power generation amounts of the power generation units 41 and 42 under the control and the power generation units 51 and 52 under the control of the central power supply command center 7 are individually determined, and the determined result is transmitted to each central unit through the communication network 6. It is transmitted to the power supply command stations 3 and 7.

Also in this case, the operation of the operation / maintenance plan support system for the power generation equipment according to the third embodiment shown in FIG. 18 is the same as that of the power generation equipment according to the first embodiment shown in FIG. Since the operation is based on the operation of the operation / maintenance plan support system, the description of the operation of the operation / maintenance plan support system for the power generation equipment according to the third embodiment will be omitted.

Next, FIG. 19 shows a fourth embodiment of the operation and maintenance plan support system for power generation equipment according to the present invention, and is a block diagram showing a main part of the system.

The example shown in FIG. 19 is a case where there is no central power supply command center, and the operation planning sections 43 and 53 are arranged in the power plants 4 and 5, respectively. The central dispatching center has a role of adjusting the amount of power generation of the power generation unit under management according to the power demand that changes from moment to moment. On the other hand, in this example, according to the power generation plan determined by the operation planning sections 43 and 53 in advance, the power generation units 41, 42, 51 and 52 are set.
This is an operation mode for driving.

Also in this case, the operation of the operation / maintenance plan support system for the power generation equipment according to the fourth embodiment shown in FIG. 19 is the same as that of the power generation equipment according to the first embodiment shown in FIG. Since the operation is based on the operation of the operation / maintenance plan support system, the description of the operation of the operation / maintenance plan support system for the power generation equipment according to the fourth embodiment will be omitted.

[0097]

As described above, according to the first aspect of the present invention, the operation and operation of each power generation unit are performed at the service center based on the power generation efficiency evaluated and calculated in real time.
Since a maintenance plan is prepared, it is possible to consider performance deterioration due to aging or failure of each power generation unit, and to operate and operate each power generation unit using plant data in a known power generation system. There is an effect that the operation cost can be reduced as compared with preparing a maintenance plan.

According to the second aspect of the present invention, when a service center formulates an operation / maintenance plan for each power generation unit based on the power generation efficiency evaluated and calculated in real time, a process estimated by an equipment model. Calculate the economic loss cost due to the performance degradation from the deviation between the measured value and the measured value, compare the economic loss cost with the cost related to the replacement of equipment or parts, and use each power generation unit using the comparison result. Since the operation and maintenance plan can be prepared, the total cost of operation and maintenance can be reduced.

Further, according to the third aspect of the present invention,
When the service center formulates an operation and maintenance plan for each power generation unit based on the power generation efficiency evaluated and calculated in real time, the operation and maintenance plan is calculated based on the calculated remaining life. Replacement of equipment or parts can be determined with higher accuracy than when equipment or parts are replaced based on the cumulative operation time of the system, and as a result, the use of equipment or parts whose life has been exceeded is Can be prevented, and economic loss due to unscheduled shutdown of the plant due to equipment or parts errors can be prevented. Alternatively, since there is no need to replace parts, there is an effect that maintenance costs can be reduced.

According to the fourth aspect of the present invention, when the service center formulates an operation / maintenance plan for each power generation unit based on the power generation efficiency evaluated and calculated in real time, only the own power generation unit is used. Instead, the operating conditions of its own power generation unit equipment or parts are changed based on the remaining life of the equipment or parts of other power generation units, so the total cost required for operation and maintenance of each power generation unit is minimized. Thus, an operation / maintenance plan can be prepared so that the cost merit obtained by the power generation company is greater than that of a known power generation system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of an operation / maintenance plan support system for a power generation facility according to the present invention, showing a main configuration thereof.

FIG. 2 is a block diagram illustrating an example of a configuration of a power generation unit illustrated in FIG.

FIG. 3 is a block diagram illustrating an example of a configuration of a service center illustrated in FIG. 1;

FIG. 4 is an explanatory diagram showing storage contents of a process value database shown in FIG. 3, and shows a structure of process data.

5 is an explanatory diagram showing storage contents of a design information database shown in FIG. 3, and shows a configuration of design information data.

FIG. 6 is an explanatory diagram showing storage contents of a device model database, and shows a configuration of device model data.

FIG. 7 is an explanatory diagram illustrating a schematic configuration of a gas turbine.

FIG. 8 is a characteristic diagram showing a temporal change in an estimated value of an electric output by a device model and an actually measured value obtained from a power generation unit.

FIG. 9 is a characteristic diagram showing an example of an analysis example of efficiency diagnosis executed by an efficiency diagnosis unit.

FIG. 10 is an explanatory diagram showing stored contents of a regular inspection information database, and shows a configuration of periodic inspection information data.

FIG. 11 is an explanatory diagram showing storage contents of a device information database, and shows a configuration of device information data.

FIG. 12 is an explanatory diagram showing stored contents of a material information database.

FIG. 13 is a graph in which a change state of a life consumption value with respect to time is plotted.

FIG. 14 is a flowchart illustrating a flow of processing when an operation plan evaluation unit formulates an operation plan using remaining life data.

FIG. 15 is an explanatory diagram showing storage contents of a failure information database, showing a configuration of failure information data.

FIG. 16 is an explanatory diagram showing stored contents of a maker information database, and shows a configuration of maker information data.

FIG. 17 is a block diagram showing a second embodiment of an operation / maintenance plan support system for power generation equipment according to the present invention, and showing a main part configuration thereof.

FIG. 18 is a block diagram showing a third embodiment of an operation / maintenance plan support system for power generation equipment according to the present invention, and showing a main part configuration thereof.

FIG. 19 is a block diagram showing a fourth embodiment of an operation / maintenance plan support system for a power generation facility according to the present invention, and showing a main part configuration thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Service center, 2 ... Power generation company, 3,7 ... Central power supply dispatching center (medium supply), 4,5 ... Power plant, 6 ... Communication network (Internet), 11,418 ... Firewall, 12 ... Part, 13: process value database, 14: equipment model database, 15: material information database, 16: failure information database, 1
7: Manufacturer information database, 18: Design information database, 19: Efficiency diagnosis unit, 20: Remaining life diagnosis unit, 21 ...
Failure frequency evaluator, 22: manufacturer priority evaluator, 23: power demand receiver, 24: operation plan information transmitter, 25: operation plan evaluator, 26: periodic inspection (regular inspection) information database, 27: equipment Information database, 41, 42, 51,
52: power generation unit, 43: operation planning section, 411: main body, 412: first sensor, 413: second sensor, 414
.., A first controller, 415, a second controller, 416, a process computer, 417, a process value transmitter.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masao Furukawa 3-1-1 Kochi-cho, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Thermal and Hydropower Division (72) Inventor Katsuhito Shimizu Omika-cho, Hitachi City, Ibaraki Prefecture 5-2-1, Hitachi, Ltd. Information Control Systems Division, Hitachi, Ltd. (72) Yasushi Hayasaka 502, Kandachi-cho, Tsuchiura-shi, Ibaraki F-term, Machinery Research Laboratory, Hitachi, Ltd. F-term (reference) 5G066 AA03 AA07 AA10 AE03 AE07 AE09

Claims (13)

[Claims] 1. A plurality of power generation units, a central power supply dispatching station, and a service center are connected and arranged via a communication network, wherein the service center acquires plant data from the plurality of power generation units through the communication network, respectively. For each of the plurality of power generation units, the power generation efficiency of the power generation unit is calculated in real time using the obtained plant data and the design data of the power generation unit, and the operation / maintenance plan of each power generation unit is calculated based on the calculated power generation efficiency. An operation / maintenance plan support system for power generation facilities characterized by planning. 2. A plurality of power generation units, a central power supply command center, and a service center are connected and arranged via a communication network, wherein the service center acquires plant data from the plurality of power generation units through the communication network, respectively. For each of the plurality of power generation units, a process value is estimated by an equipment model using the obtained plant data, a deviation value between the estimated process value and the actually measured value is obtained, and the power generation efficiency of the power generation unit is calculated from the obtained deviation value. It is characterized by calculating the economic loss cost caused by the decline and comparing the calculated economic loss cost with the cost related to replacement of equipment or parts in the power generation unit, and formulating an operation and maintenance plan for each power generation unit. Operation and maintenance plan support system for power generation facilities. 3. A plurality of power generation units, a central power supply command center, and a service center are connected and arranged via a communication network, wherein the service center acquires plant data from the plurality of power generation units through the communication network, respectively. For each of the plurality of power generation units, by calculating the remaining life of the equipment or parts of the power generation unit using the obtained plant data, and formulating the replacement time of the equipment or parts of the power generation unit based on the calculated remaining life. An operation / maintenance plan support system for a power generation facility, which formulates an operation / maintenance plan for each power generation unit. 4. A plurality of power generation units, a central power supply command center, and a service center are connected and arranged via a communication network, and the service center acquires plant data from the plurality of power generation units through the communication network, respectively. For each of the plurality of power generation units, the remaining life of the equipment or component of the power generation unit is calculated using the acquired plant data, and the calculated remaining life and the remaining power of the equipment or component of the power generation unit obtained by another power generation unit are calculated. The operation of each power generation unit is changed by changing the operating conditions of the equipment or parts of the power generation unit in comparison with the service life so as to increase economical efficiency, and extending or shortening the replacement of the equipment or parts of the power generation unit. -An operation and maintenance plan support system for power generation facilities characterized by formulating a maintenance plan. 5. The service center stores a failure history of devices or components in the plurality of power generation units in a database, and calculates a failure probability of each device or component using the failure histories stored in the database. The operation / maintenance plan support system for power generation equipment according to any one of claims 1 to 4, wherein an operation / maintenance plan for each of the power generation units is drafted in consideration of the calculated failure probability. 6. The service center stores, in a database, a manufacturer of equipment or components in the plurality of power generation units and a degree of reliability and maintenance capability of the manufacturer, and evaluates each equipment or component. The operation / maintenance plan support of the power generation equipment according to any one of claims 1 to 4, wherein the operation / maintenance plan of each power generation unit is drafted in consideration of the priority of the manufacturer stored in the database. system. 7. The operation of the power generation equipment according to claim 1, wherein the acquisition of the plant data by the service center is performed at fixed time intervals for each of the plurality of power generation units.・ Maintenance plan support system. 8. An operation / maintenance plan support system for a power generation facility having a power generation unit, comprising: means for storing plant data of the power generation unit at a desired time; and means for storing design data of the power generation unit. Means for calculating the power generation efficiency based on the stored plant data and the design data. 9. An operation / maintenance plan support system for a power generation facility provided with a power generation unit, comprising: means for storing plant data of the power generation unit at a desired time; and estimation based on an equipment model from the plant data. An operation / maintenance plan support system for a power generation facility, comprising: means for evaluating performance based on a process value and an actually measured process value from the plant data. 10. The operation of a power generation facility having a power generation unit.
A maintenance plan support system, comprising: means for storing plant data of the power generation unit at a desired time; and means for calculating remaining life of the power generation unit or parts of the power generation unit from the plant data. At least one of a means for presenting a replacement time of the power generation unit or a component of the power generation unit based on the remaining life and a means for presenting operating conditions of the power generation unit based on the calculated remaining life. Operation and maintenance plan support system for power generation facilities. 11. The operation of a power generation facility having a power generation unit.
A method for supporting a maintenance plan, comprising storing plant data of the power generation unit at a desired time, storing design data of the power generation unit, and calculating power generation efficiency based on the stored plant data and the design data. A method for supporting an operation and maintenance plan of a power generation facility, characterized by: 12. Operation of a power generation facility equipped with a power generation unit.
A maintenance plan support method, wherein plant data of a desired time of the power generation unit is stored, and performance is evaluated based on an estimated process value estimated by an equipment model from the plant data and an actually measured process value from the plant data. A method for supporting an operation and maintenance plan of a power generation facility. 13. The operation of a power generation facility having a power generation unit.
A maintenance plan support method, wherein plant data of a desired time of the power generation unit is stored, a remaining life of the power generation unit or a component of the power generation unit is calculated from the plant data, and the remaining life is calculated based on the calculated remaining life. Operating the power generation facility, comprising at least one of a step of presenting a replacement time of the power generation unit or parts of the power generation unit, and a step of presenting operating conditions of the power generation unit based on the calculated remaining life.・ Maintenance plan support method.